Geiger-Mueller Counter Tube
Geiger-Mueller tubes detect ionizing radiation through gas ionization avalanche in a cylindrical gas volume. Essential for radiation monitoring, they classify as gas electron tubes under HTS 8540.89.0020.
Import Duty Rates by Country of Origin
Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If when part of complete radiation dosimeter
Dosimeter assemblies classify under X-ray apparatus heading.
If laboratory radiation measuring instrument component
Lab instrument parts take measuring instrument classification.
Not sure which classification is right?
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Import Tips & Compliance
• Specify fill gas (helium/neon mix typical) and operating voltage plateau
• NRC import license may be required for radiation detection equipment
• Dead time and efficiency specs help establish detector function
Related Products under HTS 8540.89.00.20
Thyratron Gas-Filled Switching Tube
A thyratron is a gas-filled electron tube used for high-power switching applications in industrial controls and pulsed power systems. It operates by ionizing gas between electrodes to conduct current, fitting under HTS 8540.89.0020 as a gas electron tube distinct from vacuum or photocathode types.
Hydrogen Thyratron Pulse Modulator Tube
Hydrogen thyratrons are specialized gas electron tubes designed for radar pulse modulators and high-voltage switching in scientific instruments. The low-pressure hydrogen gas enables fast switching, qualifying as a vapor electron tube under HTS 8540.89.0020.
Mercury Arc Rectifier Gas Tube
Mercury arc rectifier tubes convert AC to DC using ionized mercury vapor in a vacuum envelope, historically used in industrial power supplies. Though largely obsolete, they remain classified as gas-filled electron tubes under HTS 8540.89.0020.
Deuterium Stabilized Gas Laser Tube
Deuterium gas laser tubes provide stable UV output for spectroscopy using gas discharge excitation. The sealed tube contains deuterium at low pressure, classifying as a gas electron tube under HTS 8540.89.0020 despite laser application.
Argon Ion Gas Laser Tube
Argon ion laser tubes generate blue-green laser light through electrical discharge in argon gas, used in scientific research and holography. Classified as gas-filled electron tubes under HTS 8540.89.0020 based on tube construction.
Ignitron Mercury Pool Tube
Ignitrons are high-current mercury pool gas tubes for welding control and electrolytic processes, igniting mercury vapor arc for conduction. They qualify under HTS 8540.89.0020 as vapor electron tubes.